异常:Cannot delete or update a parent row: a foreign key constraint fails (`jbpm4/jbpm4_execution`, CONSTRAINT `FK_EXEC_INSTANCE` FOREIGN KEY (`INSTANCE_`) REFERENCES `jbpm4_execution` (`DBID_`)) 解决方法 修改jbpm.hibernate.cfg.xml配置文件中的数据库方言mysql数据库 对应数据库方言是org.hibernate.dialect.MySQLInnoDBDialect